Katatonia is a Swedish metal band formed in Stockholm in 1991 by Jonas Renkse and Anders Nyström. The band started as a studio-only project for the duo, as an outlet for the band's love of death metal. Increasing popularity lead them to add more band members for live performances, though outside of the band's founders, the lineup was constantly changing, revolving door of musicians throughout the 1990s, notably including Mikael Åkerfeldt of the band Opeth for a period.